"And now we get to have our kids at this ceremony :)" she continued. "It'll be shorter. We'll get to the cake sooner! YAY renewal!!!"Hannigan, 39, and Denisof, 47, met on the set of Buffy the Vampire Slayerin 1999 and married in October 2003. They have two daughters, Satyana, 4, and Keeva, 1.